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What is Area 51 / Groom Lake?
Area 51 is a classified U.S. government flight-test site at Groom Lake in southern Nevada, set up in 1955 by the CIA, Air Force and Lockheed to test the U-2 spy plane, and later used for aircraft such as the A-12 OXCART and F-117. It matters to UAP disclosure because its secrecy has made it the focus of claims about hidden alien technology, most famously Bob Lazar's 1989 claim that he worked on alien craft at a nearby site called S-4, while official records tie many 1950s-60s UFO reports to U.S. reconnaissance flights. The CIA formally acknowledged Area 51 in a U-2 history released in August 2013, and the Pentagon's AARO said in 2024 it found no verifiable evidence of any U.S. program reverse-engineering extraterrestrial technology.
Key dates
- 1955 — CIA, Air Force and Lockheed personnel began arriving at the new U-2 test site near Groom Lake, which President Eisenhower approved adding to the Nevada Test Site as 'Area 51'. National Security Archive, George Washington University
- 1989 — Bob Lazar told Las Vegas reporter George Knapp that he had helped reverse-engineer the propulsion of a craft 'not made by human hands' at a site he called S-4 near Area 51; his claims remain unverified. Skeptic
- 2013-08 — The National Security Archive published a declassified CIA history of the U-2 program, the agency's first detailed official acknowledgment of Area 51. Associated Press (via MPR News)
- 2024-03 — AARO reported that a declassified CIA assessment attributed more than half of 1950s-60s UFO reports to U.S. reconnaissance flights, and that it found no verifiable evidence of reverse-engineered extraterrestrial technology. All-domain Anomaly Resolution Office, U.S. Department of Defense (copy hosted by The Black Vault)
Last reviewed 2026-10-18. Statements are attributed to the linked sources; inclusion on this page does not imply wrongdoing.
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Lazar claimed to have worked at S-4, a facility near Area 51, reverse-engineering extraterrestrial spacecraft in 1988-1989.
Frequently asked questions
Is there evidence of aliens at Area 51?+
No verified evidence has been made public. The declassified CIA history describes Area 51 as a test site for the U-2 and other spy aircraft, and AARO's 2024 report found no verifiable evidence that the U.S. government or private companies have recovered or reverse-engineered extraterrestrial technology. All-domain Anomaly Resolution Office, U.S. Department of Defense (copy hosted by The Black Vault)
When did the government admit Area 51 exists?+
In August 2013, George Washington University's National Security Archive released a CIA history of the U-2 program obtained through a records request, with references to Area 51 that had been redacted in an earlier version. Officials had acknowledged the facility in passing before then, but this was the first detailed official confirmation. Associated Press (via MPR News)
What did Bob Lazar claim about Area 51?+
In 1989 Lazar told KLAS reporter George Knapp that he had worked at S-4, a site near Area 51, on the propulsion system of a craft he said was not made by humans. Lazar says he holds degrees from MIT and Caltech, but researchers including Stanton Friedman found no record of him at either school; Lazar says his records were altered or removed. His claims have never been corroborated. Skeptic
Why are there so many UFO sightings near Area 51?+
According to a declassified CIA assessment cited by AARO, UFO reports spiked when the U-2 was flying, because it flew far higher than airliners and could catch sunlight after dusk. More than half of the UFO reports investigated in the 1950s and 1960s were assessed to be U.S. reconnaissance flights. All-domain Anomaly Resolution Office, U.S. Department of Defense (copy hosted by The Black Vault)
